Seriously, just go with a LP tank. It makes it that much easier to screw it off of the ASA and there are no ill effects. HP tanks require a lot more torque to remove which is both a pain and a potential risk to the threads or crate the risk of unscrewing something that isn't supposed to be unscrewed. You just can't run a normal blowback design off of one.
I have posted a whole thing about Minis and LP somewhere on here. Basically the manual recommends LP since the mini can't use an on/off and the mini is meant for newer players that don't necessarily know the tricks with tanks. LP makes it that much easier, and safer, to handle.

I'm getting really pissed at the amount of people that regurgitate the same techpb videos. Mike doesn't know every little situation that LP may be a better choice. It doesn't really matter which output with a mini but LP is recommended for a reason. If you don't have any experience with a subject please stop posting the same techpb point that others have posted before you. I may be jumping the gun a bit here but I have seen too many of these threads turn to shit.

In finality:
LP Cons - Blowbacks don't run.
LP Pros - Easier to remove tanks easier on threads and less chance for a new player to unscrew his bonnet without noticing.
- Usable on 99% of high end markers

HP Cons - Harder to remove tanks which can be harmful to the threads and there is a greater chance of something happening when your not paying attention
HP Pros - An industry standard preset which allows use on 97% of todays markers including blowbacks.
- Easier to find